Private closed economy based question

Question

The data of columns 1 and 2 of the below table are for a private closed economy. Given the original $20 billion level of exports, determine the equilibrium GDP if imports were $10 billion greater at each level of GDP? 

 

Answer 1

Imports = $40 billion: In the private open economy aggregate expenditures would fall by $10 billion at each GDP level and the new equilibrium GDP would be $300 billion.